If I want to feel energetic and happy I would use lemon oil on a burner. I would put 2 or 3 drops every 10 minutes for an hour on ceramic burner. The scent of lemon invigorates me and helps me to stay alert, happy and relax at the same time. This is good to use in the morning when you just wake up and you need a little boost to start your engine. Most would prefer a cup of coffee for energy boost but I prefer lemon oil aroma therapy.
I also use citronella from time to time. Citronella is good to ward off mosquito in your house. Mosquito hates the smell of citronella. I would use this on a burner for 2 hours.
I use lavender oil whenever I would take a bath in the tub. Nothing beats to end my day than sitting on a hot tub with drops of lavender to soothe your stress away. Then lit a few aromatherapy lavender scented candles while you just sit back and relax in the tub.
I like the smell of rosemary and basil. When I am stress while working, the scent of basil and rosemary relaxes me and help me to concentrate better on my work. I sometimes mix them together with a ratio of 1:1 drops.
My mom loves the scent of lemon grass oil. A number of asian food are cook has lemon grass ingredient in it and it relaxes her so much and makes her more hungry.

_________